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State PCS PYQPrelims 2023

BPSC – Combined Competitive Examination · प्रश्न 92

Bihar's geological structure consists of several rock systems. Match the rock systems with their descriptions: a. Dharwar rock system b. Vindhyan rock system c. Quaternary rock system d. Tertiary rock system 1. Created by rapid deposition of alluvium by Himalayan and Peninsular rivers 2. Found in West Champaran district 3. Part of the oldest Archaean rock system 4. Sandstone, limestone, dolomite, quartzite and shale are the main constituents

  1. a-3, b-4, c-1, d-2
  2. a-1, b-3, c-2, d-4
  3. a-2, b-3, c-4, d-1
  4. a-4, b-2, c-3, d-1
उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (A) a-3, b-4, c-1, d-2

स्पष्टीकरण

In Bihar, Tertiary (Shivalik) rocks occur in the north of West Champaran; Quaternary alluvium covers the Ganga plain.

  • (A) बरोबर

    Correct: Dharwar–Archaean, Vindhyan–sandstone/limestone, Quaternary–alluvium, Tertiary–West Champaran (Shivalik).

  • (B) चूक

    Wrong: Dharwar is not alluvial.

  • (C) चूक

    Wrong: most pairs are wrong.

  • (D) चूक

    Wrong: most pairs are wrong.